کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9804005 | 1516476 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of bulk modification by Pd on electrochemical properties of MgNi
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
An amorphous MgNi alloy was prepared by ball-milling of Mg2Ni and Ni with 10Â mol% of Pd for 80Â h, and effects of the bulk modification by Pd on the electrochemical properties of amorphous MgNi were investigated by using a conventional two-electrode system. It was found through X-ray diffraction (XRD) and high-resolution transmission electron microscope (HRTEM) analyses that Pd dissolved uniformly into the bulk of MgNi during the ball milling without affecting the amorphous structure of MgNi. As a result, the cycle life of Pd-modified MgNi in alkaline solution was significantly improved. HRTEM and XRD observations showed that a dense layer of fine grains of Mg(OH)2 covered over the surface of unmodified MgNi powder after the immersion in alkaline electrolyte solution, whereas no appreciable extent of Mg(OH)2 formation was observed on the Pd-modified MgNi powder. These observations demonstrate that the Pd bulk modification is very effective to suppress the formation of Mg(OH)2 layer and hence gives rise to the remarkable improvement of the cycle life of the electrode.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 391, Issues 1â2, 5 April 2005, Pages 313-317
Journal: Journal of Alloys and Compounds - Volume 391, Issues 1â2, 5 April 2005, Pages 313-317
نویسندگان
Tiejun Ma, Yuji Hatano, Takayuki Abe, Kuniaki Watanabe,